Guhring 9005520079400 Screw Machine Drill Bit 5/16in Hss

Product Description

The GUHRING 9005520079400 is a screw machine length (stub) drill bit engineered for high-performance drilling in steel, aluminum, and non-ferrous materials. At 5/16 inches (0.3125 inches) in diameter, it features a 130-degree point angle with cone relief geometry for fast, clean entry and reduced thrust. The parabolic flute design promotes aggressive chip evacuation, which is critical when drilling deeper holes in gummy or stringy materials. Built from high-speed steel (HSS) with a bright, uncoated finish, this bit is suited for general-purpose production and maintenance drilling where a shorter overall length improves rigidity and reduces deflection. It conforms to DIN 1897 and is rated as a high-performance grade bit.

This bit is designed for use in screw machine operations, CNC lathes, drill presses, and handheld drill applications where stub-length rigidity is preferred over jobber-length reach. The 3xD flute-to-diameter ratio and web-thinned parallel web configuration make it particularly effective for through-hole drilling in steel and aluminum workpieces. Machinists, tool and die technicians, and maintenance professionals working in metal fabrication and production environments will find this bit appropriate for repetitive, close-tolerance drilling tasks.

Key Features

• 130-degree cone relief point angle reduces thrust and improves self-centering on entry
• Parabolic flute geometry accelerates chip evacuation in deep and interrupted cuts
• Stub (screw machine) length provides increased rigidity and reduced deflection versus jobber-length bits
• Web-thinned parallel web lowers cutting resistance and extends tool life
• Right-hand cutting direction for standard drill press and CNC spindle use
• Conforms to DIN 1897 specification for consistent dimensional quality

Compatibility

Designed as a DIN 1897 stub-length HSS drill bit for use with standard straight-shank drill chucks on screw machines, CNC lathes, drill presses, and hand drills accepting a 5/16-inch straight-cylindrical shank. Primary workpiece materials are steel, aluminum, and non-ferrous metals.

Installation Notes

This bit is installed by trade machinists and maintenance technicians using a standard drill chuck compatible with a 5/16-inch straight-cylindrical shank. Ensure the spindle and chuck are free of debris before seating the shank fully. Secure the chuck to the rated torque of the equipment before operation. Follow applicable shop safety protocols and machine guarding requirements when operating drilling equipment.